US112192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in tuyeres
Assignee: —
•
Filing: —
•
Granted: 1871-02-28
•
Expires: 1888-02-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:52
CPC Classifications
F; F16; F16K; F16K15/00; F24; F24B; F24B5/00; E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; F16K15/02; F16K15/021; F24B13/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2557
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1874-02-27 | 1874-08-29 | 1875-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1878-02-27 | 1878-08-29 | 1879-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1882-02-27 | 1882-08-29 | 1883-02-28 | $7700.00 | Window Closed / Lapsed |